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Year of discovery 1869
He was a swish physician and biologist.
He isolated mullein from cell nuclei and was first to identify DNA as a distinct molecule, not a part of a protien.

Source www.dnaftb.org

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Year of discovery 1905.
He found the ratios between the different nitrogenous base pairs. He also invented the chargaffs rules and he discovered nucleotides.
Source www.famousscientists.org

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Year of discovery 1928
Fredrick was a bacteriologist and he was the first to discover the transforming principle. This led to a follow up discovery that DNA acts as the carrier for genetic information.
Source www.britanica.com

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Year of discovery 1930
Oswald was a molecular biologist.
Oswald discovered that isolated DNA is the materials of which genes and chromosomes are made.
Source dnalc.cshl.edu

# data[].attributes.body
Year of discovery 1930
During his time as a scientist, he studied quantum mechanics and specifically focused bonding of different atoms and the alpha helix structure of DNA. He also found the sickle cell anemia a molecular disease.

Sources www.famousscientists.com

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Year of discovery 1946
Hershey and his assistant were both phage geneticists who create the Hershey chase blender experiment. This experiment proved that DNA was the genetic material in phased and not the proteins.

Source www.dnaftb.org

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Year of discovery  1953
Rosalind discovered the structure of the deoxyribose nuclei acid, and found that it was in the shape of a double helix or twisted ladder shape.

Sources https://www.britannica.com

# data[].attributes.body
Year of discovery 1953.
Using X-ray diffraction he created the best quality X-ray images of DNA seen at that time.
Sources
Www.famousscientists.org

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https://www.famousscientists.org/images1/maurice-wilkins.jpg

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Year of discovery 1953
Took credit for discovering the shape of DNA and that it is identified as the molecule containing genes, some theories suggest that they stole some work from scientists, they were also one of the few scientist who received a Nobel prize for their discoveries on DNA

Source
www.history.com